Welcome to OpenSign

Learn more about ASP.NET Core and cryptography.

Keys
Secure Key Generation

Generate RSA keys with variable sizes, encrypted using AES-256-CBC or AES-256-CTR for secure storage.

Go to Key Generation
Sign
Signature with Alternatives

Create documents with dynamic fields and sign each combination using RSA or HMAC with a secret passphrase.

Go to Sign Workflow
Verify
Signature Verification

Fill in a document and verify your combination using allowed RSA signatures or valid HMACs per combination.

Go to Validation Workflow